Fix issue #597 - error if bin is a source file

src/nimblepkg/packageparser.nim

@@ -253,6 +253,8 @@ proc readPackageInfoFromNimble(path: string; result: var PackageInfo) =
             result.installExt.add(ev.value.multiSplit)
           of "bin":
             for i in ev.value.multiSplit:
+              if i.splitFile().ext == ".nim":
+                raise newException(NimbleError, "`bin` entry should not be a source file: " & i)
               result.bin.add(i.addFileExt(ExeExt))
           of "backend":
             result.backend = ev.value.toLowerAscii()

tests/issue597/dummy.nimble

@@ -0,0 +1,12 @@
+# Package
+
+version       = "0.1.0"
+author        = "Author"
+description   = "dummy"
+license       = "MIT"
+
+# Dependencies
+
+requires "nim >= 0.17.0"
+
+bin = @["test.nim"]

tests/tester.nim

@@ -585,6 +585,12 @@ test "can pass args with spaces to Nim (#351)":
     checkpoint output
     check exitCode == QuitSuccess
 
+test "error if `bin` is a source file (#597)":
+  cd "issue597":
+    var (output, exitCode) = execNimble("build")
+    check exitCode != QuitSuccess
+    check output.contains("entry should not be a source file: test.nim")
+
 suite "reverse dependencies":
   test "basic test":
     cd "revdep/mydep":